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May be, I put they in all models and works perfect.
Suspen.... Parts.net only have one kind of dust seals and says that are compatible with all models...
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Are the same.
It may be because the dust seal housing in 1 and 2 is a little narrower, 1 and 2 do not have lock washers, 3 and 4 do. In 1 and 2 it costs a little more to put them for that reason.
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The differences between 1,2,3 and 4 are minimal, I have put these dust seals on the 4 models without problems, they are generic, they are not original answers.
Shipping Fromm Spain vía ordinary post I think can be 3/4€ depending quantity.